Triple Seven No.2
Key Takeaway
Triple Seven No.2 is classified as low hazard in South Dakota. It was completed in 1947 and is 79 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 23 ft (taller than 49.8% in SD) |
| Dam Length | 800 ft |
| Dam Type | Earth |
| Max Storage | 165 acre-ft |
| Normal Storage | 101 acre-ft |
| Max Discharge | 2,100 cfs |
| Year Completed | 1947 (79 years old) |
| NID ID | SD01378 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
HILLENBRAND INDUSTRIES
Private
Nearby Dams
Triple 7 Ranch Dam
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Low Hazard 32 ftHarrison No.1
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Low Hazard 23 ftTriple Seven No.1
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Significant Hazard 30 ftBrophy Big Dam
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Low Hazard 28 ftSmith No.1
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Significant Hazard 28 ftGregorson No.1
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Significant Hazard 34 ftWilson Ranch Dam
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Low Hazard 24 ftFrequently Asked Questions
What is the hazard classification of Triple Seven No.2?
Triple Seven No.2 is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Triple Seven No.2?
Triple Seven No.2 is owned by HILLENBRAND INDUSTRIES (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Triple Seven No.2 built?
Triple Seven No.2 was completed in 1947, making it 79 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Triple Seven No.2?
Triple Seven No.2 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Triple Seven No.2?
Triple Seven No.2 has a dam height of 23 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.